(Solved):   A simple random sample of size \( \mathrm{n} \) is drawn from a population that is known t ...

 

A simple random sample of size \( \mathrm{n} \) is drawn from a population that is known to be normally distributed. The sample variance, \( s^{2} \), is determined to be 11.6. Complete parts (a) through (c). (a) Construct a \( 90 \% \) confidence interval for \( \sigma^{2} \) if the sample size, \( \mathrm{n} \), is 20 . The lower bound is (Round to two decimal places as needed.)